HICKSON, Catherine J. The May 18, 1980, Eruption of Mount St. Helens, Washington State: A synopsis of events and review of Phase 1 from an eyewitness perspective. Geoscience Canada, [S. l.], v. 17, n. 3, 1990. Disponível em: https://journals.lib.unb.ca/index.php/GC/article/view/3664. Acesso em: 18 apr. 2024.